/branches/RP_Layout_707/trunk/system/helpers/string_helper.php

https://github.com/holsinger/openfloor · PHP · 154 lines · 52 code · 16 blank · 86 comment · 5 complexity · 3fd3cbfe66da44e8bde91643e2eb6ba2 MD5 · raw file 

    

  1. <?php  if (!defined('BASEPATH')) exit('No direct script access allowed');

    2. 

  2. /**

    3. 

  3.  * CodeIgniter

    4. 

  4.  *

    5. 

  5.  * An open source application development framework for PHP 4.3.2 or newer

    6. 

  6.  *

    7. 

  7.  * @package		CodeIgniter

    8. 

  8.  * @author		Rick Ellis

    9. 

  9.  * @copyright	Copyright (c) 2006, EllisLab, Inc.

    10. 

  10.  * @license		http://www.codeignitor.com/user_guide/license.html

    11. 

  11.  * @link		http://www.codeigniter.com

    12. 

  12.  * @since		Version 1.0

    13. 

  13.  * @filesource

    14. 

  14.  */

    15. 

  15. 

    16. 

  16. // ------------------------------------------------------------------------

    17. 

  17. 

    18. 

  18. /**

    19. 

  19.  * CodeIgniter String Helpers

    20. 

  20.  *

    21. 

  21.  * @package		CodeIgniter

    22. 

  22.  * @subpackage	Helpers

    23. 

  23.  * @category	Helpers

    24. 

  24.  * @author		Rick Ellis

    25. 

  25.  * @link		http://www.codeigniter.com/user_guide/helpers/string_helper.html

    26. 

  26.  */

    27. 

  27. 

    28. 

  28. // ------------------------------------------------------------------------

    29. 

  29. 

    30. 

  30. /**

    31. 

  31.  * Trim Slashes

    32. 

  32.  *

    33. 

  33.  * Removes any leading/traling slashes from a string:

    34. 

  34.  *

    35. 

  35.  * /this/that/theother/

    36. 

  36.  *

    37. 

  37.  * becomes:

    38. 

  38.  *

    39. 

  39.  * this/that/theother

    40. 

  40.  *

    41. 

  41.  * @access	public

    42. 

  42.  * @param	string

    43. 

  43.  * @return	string

    44. 

  44.  */	

    45. 

  45. function trim_slashes($str)

    46. 

  46. {

    47. 

  47.     return trim($str, '/');

    48. 

  48. } 

    49. 

  49. 	

    50. 

  50. // ------------------------------------------------------------------------

    51. 

  51. 

    52. 

  52. /**

    53. 

  53.  * Reduce Double Slashes

    54. 

  54.  *

    55. 

  55.  * Converts double slashes in a string to a single slash,

    56. 

  56.  * except those found in http://

    57. 

  57.  *

    58. 

  58.  * http://www.some-site.com//index.php

    59. 

  59.  *

    60. 

  60.  * becomes:

    61. 

  61.  *

    62. 

  62.  * http://www.some-site.com/index.php

    63. 

  63.  *

    64. 

  64.  * @access	public

    65. 

  65.  * @param	string

    66. 

  66.  * @return	string

    67. 

  67.  */	

    68. 

  68. function reduce_double_slashes($str)

    69. 

  69. {

    70. 

  70. 	return preg_replace("#([^:])//+#", "\\1/", $str);

    71. 

  71. }

    72. 

  72. 	

    73. 

  73. // ------------------------------------------------------------------------

    74. 

  74. 

    75. 

  75. /**

    76. 

  76.  * Create a Random String

    77. 

  77.  *

    78. 

  78.  * Useful for generating passwords or hashes.

    79. 

  79.  *

    80. 

  80.  * @access	public

    81. 

  81.  * @param	string 	type of random string.  Options: alunum, numeric, nozero, unique

    82. 

  82.  * @param	integer	number of characters

    83. 

  83.  * @return	string

    84. 

  84.  */	

    85. 

  85. function random_string($type = 'alnum', $len = 8)

    86. 

  86. {					

    87. 

  87. 	switch($type)

    88. 

  88. 	{

    89. 

  89. 		case 'alnum'	:

    90. 

  90. 		case 'numeric'	:

    91. 

  91. 		case 'nozero'	:

    92. 

  92. 		

    93. 

  93. 				switch ($type)

    94. 

  94. 				{

    95. 

  95. 					case 'alnum'	:	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

    96. 

  96. 						break;

    97. 

  97. 					case 'numeric'	:	$pool = '0123456789';

    98. 

  98. 						break;

    99. 

  99. 					case 'nozero'	:	$pool = '123456789';

    100. 

  100. 						break;

    101. 

  101. 				}

    102. 

  102. 

    103. 

  103. 				$str = '';

    104. 

  104. 				for ($i=0; $i < $len; $i++)

    105. 

  105. 				{

    106. 

  106. 					$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);

    107. 

  107. 				}

    108. 

  108. 				return $str;

    109. 

  109. 		  break;

    110. 

  110. 		case 'unique' : return md5(uniqid(mt_rand()));

    111. 

  111. 		  break;

    112. 

  112. 	}

    113. 

  113. }

    114. 

  114. // ------------------------------------------------------------------------

    115. 

  115. 

    116. 

  116. /**

    117. 

  117.  * Alternator

    118. 

  118.  *

    119. 

  119.  * Allows strings to be alternated.  See docs...

    120. 

  120.  *

    121. 

  121.  * @access	public

    122. 

  122.  * @param	string (as many parameters as needed)

    123. 

  123.  * @return	string

    124. 

  124.  */		

    125. 

  125. function alternator()

    126. 

  126. {

    127. 

  127. 	static $i;	

    128. 

  128. 

    129. 

  129. 	if (func_num_args() == 0)

    130. 

  130. 	{

    131. 

  131. 		$i = 0;

    132. 

  132. 		return '';

    133. 

  133. 	}

    134. 

  134. 	$args = func_get_args();

    135. 

  135. 	return $args[($i++ % count($args))];

    136. 

  136. }

    137. 

  137. 

    138. 

  138. // ------------------------------------------------------------------------

    139. 

  139. 

    140. 

  140. /**

    141. 

  141.  * Repeater function

    142. 

  142.  *

    143. 

  143.  * @access	public

    144. 

  144.  * @param	string

    145. 

  145.  * @param	integer	number of repeats

    146. 

  146.  * @return	string

    147. 

  147.  */	

    148. 

  148. function repeater($data, $num = 1)

    149. 

  149. {

    150. 

  150. 	return (($num > 0) ? str_repeat($data, $num) : '');

    151. 

  151. } 

    152. 

  152. 

    153. 

  153. 

    154. 

  154. ?>
    155.